Pump-coupling.



LOUIS O. HAMEL, OF APPLETON, WISCONSIN.

PUMP-COUPLING.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed April 26, 1907. Serial No. 370,460.

To all whom it may concern:

Be it known that I, LoUIs G. IIAMEL, a citizen of the United States,residing at Appleton, in the county of Outagamie and State of Wisconsin,have invented a new and useful Pump-Coupling, of which the following isa specification.

This invention relates to improvements in devices for connecting pumpsto their operating devices, and it has for its object to provide animproved mounting for the coupling pin that is especially adapted foruse on couplings for windmills and similar devices wherein it isdesirable or necessary at times to disconnect the pump from the motorand to connect it for manual operation, the present invention providinga device of this character that may be readily applied to any of theordinary couplings employing a pin or bolt connection without thenecessity of fitting it according to variations in the sizes of thecouplings, and it is capable of being advantageously applied tocouplings already in use.

To these and other ends, the invention comprises the various novelfeatures of construction and combination and arrangement of parts, whichwill be hereinafter more fully described, and pointed out particularlyin the claims appended hereto.

In the accompanying drawing :-Figure 1 is a sectional view of the pumpcoupling showing my present invention applied thereto, the connectingpin being shown in operative position. Fig. 2 is a view similar to Fig.1, the pin supporting sleeve being shown in section, and the pin beingshown in its retracted position. Fig. 3 represents a transverse sectionon the line 33 of Fig. 2. Fig. 4 shows the application of the inventionto a pump handle.

Corresponding parts in the several figures are indicated throughout bysimilar characters of reference.

The pump coupling shown in the present embodiment of my invention is ofthe ordinary type that is applied to windmills and analogous devices,comprising a casting 1 having a vertically extending aperture 2 toloosely receive the pump rod 3, the latter being provided with one ormore apertures 4 extending transversely thereof and adapted to receivethe connecting pin. The rear wall 5 of the casting is riveted, orotherwise secured, to the connecting rod 6 of the windmill or other formof motor, a gas engine being employed in many instances, and the forwardwall 7 of the casting is provided with a threaded aperture 8, the rearwall of the connecting rod being provided with an aperture 9 which isarranged in alinement with the axis of the threaded aperture at theopposite end of the casting.

The connecting pin 10 in the present instance is fitted within andadapted to reciprocate axially of a sleeve 11, the latter having one endthreaded, as at 12, and screwed into the threaded aperture 8 of thecastin The connecting pin is provided with a reduced operating stem 13which projects through a reduced opening 1 1 in the sleeve and isprovided with an operating head 15, the latter being preferably composedof a casting having a tapered aperture 16 into which the correspondinglyshaped end of the pin operating stem is driven, the end of the latterbeing riveted to prevent disengagement of the parts. On the under sideof the head is provided a projection 17 which extends inwardly towardthe coupling a distance substantially equivalent to the movement of thepin in locking and unlocking the coupling relatively to the pump rod,and on the other end of the sleeve is formed a laterally extending lug18, the projection on the head being moved into and out of line with thesaid lug by a relative rotary movement between the head and sleeve.

The bore 11 of the sleeve is suiiiciently reduced relatively to the fulldiameter of the interior of the sleeve to form a shoulder or abutment 19adapted to cooperate with the outer end of a helical compression spring20 which is inclosed within the sleeve and encircles the pin operatingstem,the inner end of the spring cooperating with a shoulder 21 formedat the outer end of the connecting pin. The spring normally acts to movethe pin towarl the pump rod, and when the apertures therein registerswith the axis of the pin, the latter will pass through the aperture inthe pump rod and rest in the aperture 9 formed in the rear wall of thecoupling, thereby forming an operative connection between the pump andits motor or operating mechanism, the normal tendency of the springserving to retain the pin in locked position. WVhenever it is desirableto disconnect the pump relatively to its operating means, the pin isretracted by manipulation of the head 15, and after the pin has beenretracted, the head is turned about the pin as an axis, bringing theprojection 17 in line with the laterally extending lug 18 on the sleeve,and when the head is released, these parts operate to retain the pin inretracted position, and the pump rod and coupling will operate freelyrelatively to one another, the pump rod operating loosely ithrough thevertical aperture 2 .of the couping.

In applying the invention to a pump handle, a threaded aperture 22 isformed in one of the fork members 23 of the handle, the threadedaperture being arranged in aline-.

ment with the aperture 24 in the opposite fork member, the pump rod 25being connected and disconnected relatively to the handle or operatingpart by manipulating the pin in the manner hereinbefore described.

The improvement may be applied to couplings, pump handles, and otheroperating parts in a very simple way, one of the apertures of the usualconnecting pin being. tapped to receive the threaded end of the sleeve,the axis of the latter being alined relatively to the other pinreceiving aperture, and it may be advantageously applied to couplings,and the like, that have been in use so long that the pin receivingapertures are considerably worn, the sleeve in such cases serving as abushing to eliminate the lost movement between the coupling and the P mpr lVhat is claimed is v 1. A pin attachment for pump couplingscomprising a sleeve having one end adapted to be inserted into one ofthe pin-receiving apertures of the coupling and the other end closed upto a central perforation and also provided with a side lug or ledgeadapted I when the sleeve is in place to project down- I wardly, aconnecting pin having its stem projecting through the perforation in theend of the sleeve, a spring housed in the sleeve and surrounding thestem of the pin, and a head secured to the outer end of the stem and ofan area greater than that of the end .of the sleeve, said head having atone side a projection parallel with the stem and constituting a distanceand gravity member for maintaining the pin in the retracted position byengaging the ledge.

2, A pin attachment for pump pistons comprising a sleeve formed at oneend with its screw threads for insertion into the pinreceiving apertureof the coupling and having the other end closed and formed with alateral lug or ledge, the sleeve with the lug or ledge being all cast inone piece, a con necting pin housed in said sleeve and hav- ;ing one endprojected beyond the threaded end thereof, said pin being provided witha stem extending through a perforation in the closed end of the sleeve,a spring surrounding the stem of the pin within the sleeve, and a headsecured to the outer end of the stem, said head being of greater areathan the end of the sleeve and having formed on it a spacing projectionparallel with the stem and constituting a distance and gravity memberfor maintaining the pin in the retracted position by engaging the ledgeon the sleeve.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

LOUIS C. HAMEL. lVitnesses WM. F. KAMPs, PAUL STAEDT.

